【作者】 严书婷； 彭卫； 李强； 王璐璐；

【Author】 YAN Shuting;PENG Wei;LI Qiang;WANG Lu-lu;School of Architecture and Civil Engineering, Chongqing Jiaotong University;College of Civil and Architectural Engineering, Ningbo Institute of Technology, Zhejiang University;Hangzhou Survey Design and Research Institute Co., Ltd.;

【机构】 重庆交通大学建筑与土木工程学院； 浙江大学宁波理工学院土木建筑工程学院； 杭州市勘测设计研究院；

【摘要】 在混合气候地区,研究良态风和台风作用下的桥梁失效机理具有重要的理论意义和工程价值。采用谐波叠加法分别模拟建设场地处的良态风和台风风场,针对浙江舟山某跨海斜拉桥分别进行良态风和台风风场下主梁和斜拉索的抖振分析。结果显示,台风作用下桥梁的位移风振系数比良态风下的位移风振系数大,台风作用下的斜拉索疲劳损伤远大于良态风下的疲劳损伤。斜拉索疲劳损伤对风速十分敏感,随风速增大疲劳损伤显著增大。更多还原

【Abstract】 In mixed climate areas, the study of failure mechanism of bridge under the influence of typhoon and monsoon has important theoretical significance and engineering value. The harmonic superposition method was used to simulate the monsoon and the typhoon wind field at the construction site respectively. For a cross-sea cable-stayed bridge located in Zhoushan, the buffeting analysis of main girder and stay cables under the monsoon and the typhoon wind field was carried out. The results show that the displacement wind vibration coefficients of the bridge under the typhoon are larger than those under the monsoon, and the fatigue damage of the stay cable under the typhoon is much larger than that under the monsoon. The fatigue damage of the stay cable is very sensitive to wind speed, which increases significantly with the increase of wind speed.更多还原